| // This file was procedurally generated from the following sources: |
| // - src/dstr-binding-for-await/ary-ptrn-rest-id-iter-val-err.case |
| // - src/dstr-binding-for-await/error/for-await-of-async-func-var.template |
| /*--- |
| description: Error forwarding when IteratorValue returns an abrupt completion (for-await-of statement) |
| esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation |
| features: [Symbol.iterator, destructuring-binding, async-iteration] |
| flags: [generated, async] |
| info: | |
| IterationStatement : |
| for await ( var ForBinding of AssignmentExpression ) Statement |
| |
| [...] |
| 2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, |
| varBinding, labelSet, async). |
| |
| 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation |
| |
| [...] |
| 4. Let destructuring be IsDestructuring of lhs. |
| [...] |
| 6. Repeat |
| [...] |
| j. If destructuring is false, then |
| [...] |
| k. Else |
| i. If lhsKind is assignment, then |
| [...] |
| ii. Else if lhsKind is varBinding, then |
| [...] |
| iii. Else, |
| 1. Assert: lhsKind is lexicalBinding. |
| 2. Assert: lhs is a ForDeclaration. |
| 3. Let status be the result of performing BindingInitialization |
| for lhs passing nextValue and iterationEnv as arguments. |
| [...] |
| |
| 13.3.3.6 Runtime Semantics: IteratorBindingInitialization |
| BindingRestElement : ... BindingIdentifier |
| 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, |
| environment). |
| 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, |
| [...] |
| c. Let nextValue be IteratorValue(next). |
| d. If nextValue is an abrupt completion, set iteratorRecord.[[done]] to |
| true. |
| e. ReturnIfAbrupt(nextValue). |
| |
| ---*/ |
| var poisonedValue = Object.defineProperty({}, 'value', { |
| get: function() { |
| throw new Test262Error(); |
| } |
| }); |
| var iter = {}; |
| iter[Symbol.iterator] = function() { |
| return { |
| next() { |
| return poisonedValue; |
| } |
| }; |
| }; |
| |
| async function fn() { |
| for await (var [...x] of [iter]) { |
| return; |
| } |
| } |
| |
| fn() |
| .then(_ => { |
| throw new Test262Error("Expected async function to reject, but resolved."); |
| }, ({ constructor }) => { |
| assert.sameValue(constructor, Test262Error); |
| |
| }) |
| .then($DONE, $DONE); |